索引的确能增强DB 2查询性能，但如果一个表上放置太多索引，那么最终响应时间和流量将走向错误方向。
Indexes can really turbocharge DB2 query performance, but if you put too many on a table, you could end up with response time and throughput going in the wrong direction.
她强调，这只是很简单的错误，但也会流失潜在收入。 而因为没有进行网站流量分析，很多公司都没发现这些问题的存在。
She emphasised that it’s simple mistakes that lose potential revenue but without Web analytics most companies are unaware that such problems exist.
404错误和失效链接对于你的搜素引擎排名也是有负面影响的，因此主动避免失效链接的出现可以有效的高网站曝光率以及增加网站流量。
404 errors and broken links also have negative effects on your search engine rankings so it is quite reasonable to be proactive in avoiding them to improve exposure and increase site traffic.
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